“…He reported that thermal ageing, performed below 80°C does not significantly change elastic active chains (EAC) density while oxidative ageing strongly increases it. All the samples studied were filled, but the possible influence of the fillers on the oxidation rate [22], [23] was not taken into account in the discussion, which hinders any definitive conclusion on the mechanisms involved in the matrix alone. Besides, using only mechanical tests, he could not dissociate them, neither he evaluated their different contribution.…”